Note 5 — On the dermal armour of Jacare and Caiman, with notes on the Specific and Generic Characters of recent Crocodilia. By T. H. Huxley, Esq., F.R.S., F.L.S., Prof. of Nat. History, Gov. School of Mines.

In a skull of this species 141/2 inches long, in the British Museum, the vomers are completely excluded from the palate, and their anterior ends do not extend for an eighth of an inch beyond the palatine part of the palato-maxillary suture, which lies on a level with the anterior margin of the twelfth alveolus. Each vomer is 23/8 inches long, and presents the same general form as that of Jacare; only the anterior division is but a very small, flat and thin plate, not a quarter of an inch long. The boundary of the median nares is formed in equal proportions by the vomer and the palatine, and is opposite the fourteenth tooth. The hinder end of the vomer articulates with the end of the descending process of the prefrontal.